The Thirteenth Heaven Rugby isn't the same as a velocity systems rugby. This rugby is cut differently and fits considerably more snug than the VELSYS. I have a few VELSYS versions and love them, I size up because I hate things being too clingy, and the VELSYS 3XL is extremely flowy and loose. These are considerably more form-fitting, and the 3XL still fits more like an XL, I had the same issue with the Born Primative. Fantastic shirts, but I dislike the collar. This rugby isn't bad, just not what I was looking for, the AOR1 pattern isn't horrible and looks decent.